Imperiled
Perennial, more or less densely pubescent with closely appressed more or less stellate trichomes, these 0.2-0.3 mm in diameter, sessile or substipitate, smooth or finely granular, rays 4-7, distinct but stout and usually contiguous at their bases and...
Perennial; stems decumbent or spreading, silky-villous, 10-20 cm long; basal leaves palmately 5-foliate, leaflets oblanceolate, 3-5 cm long, finely serrate, silky and green above, densely white tomentose beneath; upper leaves trifoliate or simple; st...
Perennial herb to 8 cm tall; stems and rootstocks numerous, short, and almost matted, appearing caespitose; leaves digitately 5-foliate; leaflets divided terminally into three lobes; leaflet bases narrowly cuneate; midvein of leaflets raised on lower...
Stems usually solitary, depressed-globose to ovoid, 3.2-11.0 cm long, 3.8-8.0 cm in diameter; ribs 13-17; tubercles inconspicuous; areoles woolly; central spines absent or rarely 1, radial spines 7-13, straw-colored, spreading, 6-13 mm long; flowers ...
Herbaceous perennial; stems mostly single and unbranched, glabrous, slender, 4-10(12) dm tall; leaves opposite, lanceolate to ovate, acute, obtuse to cordate at base, coarsely and unevenly laciniate-serrate, thin, glabrous except sparsely glandular p...
Herbaceous perennial, 4-11 dm tall, with 1-several stems; leaves glabrous, opposite or whorled, broadly lanceolate to ovate, coarsely serrate, thin, 6-8 cm long; inflorescence a loose, few-branched, terminal panicle, somewhat glandular pubescent; flo...
Low perennial, from multicipital caudex; stems ascending, 10-15 cm high, finely retrorsely grayish puberulent, becoming glandular in the inflorescence; basal and lowest stem leaves usually withered at anthesis; stem leaves 5-8 pairs, linear, acuminat...
Perennial herb; stems ascending-erect, (4-) 8-12 dm tall, moderately puberulent and branching on the upper half; leaves densely arranged on the stems, thick textured, elliptic-lanceolate to elliptic-oblanceolate, 4-7 cm long, 12-20 mm wide, smaller i...